Flexural behavior of one-way ferrocement slabs with fibrous cementitious matrices

Concrete compressive strength enhancement is considered as one of the popular topics in the field of civil engineering. It has received a massive attention by material and structural engineers over the past decades. The aim of this study is to investigate thin mortar matrix for the impacts of the combination of reinforcing steel meshes with discontinuous fibers, and to do this, one-way Ferrocement slabs were tested under bending with steel fibers and meshes, focusing more on the number of mesh layers (1, 2, & 3) as the studied parameter. The percentages of fiber content as volumetric ratio 0.25, 0.5 and 0.75 and type of fibers golden steel fibers and waste aluminum fibers from waste metallic cans. Results showed that at general the adding of fibers regardless of its type increased the ductility of tested slabs. In addition, results showed that steel fibers are more effective than aluminum fibers

Effectiveness of Glass Wastes as Powder on Some Hardened Properties of Concrete

This paper present glass waste material reusing in concrete as partial replacement of cement.  Some hardened properties like compressive and flexural strengths, modulus of elasticity and % absorption was made. The effect of glass powder on these properties was examined compared to reference specimens without glass powder. Five percentage was tested: 0%(reference), 10%, 15%, 20% and 25%. From tests results one can conclude that replacing cement partially by glass powder enhanced strengths of concrete (compression and flexural) up to 20% replacing level Using glass powder as partial replacement of cement improved strengths and modulus of elasticity of concrete. The %absorption decrease with increasing of glass powder content. The results show that utilization of waste glass as powder in concrete can reduce amount of cement which save cost besides its environmental benefits

BENEFICIAL ROLE OF GLASS WASTES IN CONCRETE – A REVIEW

Environmental problems have been taking into consideration as serious situation in the modern construction. Reusing and recycling the wastes consider as the only methods to reduce waste generated. However, the applications still have much opportunity for enhancement. This scientific paper review the researches in field of glass waste material reusing in construction application. The influence of the size and content of particles and the percentage of wastes replacement on fresh and hardened properties of concrete are also been discussed

Evalutions of strengths, impact and energy capacity of two-way concrete slabs incorprating waste plastic

This work is about investigated the effectiveness of inclusion of local waste, represented by plastic water drink bottles caps (CPPA), in the concrete as a partial substitute for coarse aggregates. Compressive, flexural and splitting strengths were evaluated for plain concrete. For reinforced concrete (R.C.), bond strength between reinforced bar and surrounding concrete has been evaluated. In additional, impact resistance, energy absorption capacity, mid-span deflection and crack width for Two-way R.C. slab subjected to repeated impact load have been evaluated. Five different content of plastic aggregate were examined; 0%, 15%, 30%, 45%, 60% and 75% of CPPA. Tests Results showed that strengths (compressive, splitting, flexural and bond strengths) improved for plastic content 15% and 30% especially at 15%. While these strengths began to decrease with increasing plastic's content over 30%. For R.C. slabs, number of blows that caused failure increased with increasing plastic content up to 45%, which mean increasing in impact resistance and increasing in energy-absorbed capacity. Based on the experimental results, empirical equations were proposed of calculating splitting, flexural, bond strengths and energy-absorbed capacity for concrete incorporating CPPA. According to results of this investigation, for structural reinforced concrete, 15% and 30% of this type of plastic is recommended to be used as partial replacement of gravel